The most complete rotational analysis is that reported by Tetenbaum
[52008] for the
J = 6-5 lines, Burrus and Gordy
[56005] for the
millimeter transitions and Oka and Hirakawa
[57002] for the
J = 1-0 and J = 2-1 transitions.
Although the small differences in the rotational and hyperfine constants
reported in these independent studies might be eliminated by refitting the
entire data set, the magnitude of such an effort could not be justified in
light of the slight improvements foreseen. Note that the frequency for the upper
ℓ-doublet of 79BrCN
in table IX of Burrus and Gordy
[56005] should
read 223 150.44. Also the present tables have labeled the
vibrational state for the Br-C stretch as
υ3
rather than υ1
which was used in the references cited.